Island



v (No Model.) 3 Sheets-Sheet 1.

FfBPORSELL. LOCK (N J I I 3 sheets-sheet; 3.

- P. E. PORSELL.

LOCK.

No. 530,935. Pat-epted Dec. 18,1894.

UNITED STATES FRANS FORSELL, OF'PROVIDENOE, RHODE I'SLAND.

PATENT OFFICE.

LOCK.

FEPECIFIGATION forming part of Letters Patent No. 530,935, datedDecember 18, 1894.

I Application filed August 28,1894. Serial No. 521,569. (No model.)

. To all whom it mag concern..-

out as follows, reference being had to the ac- 5o ings.

companying drawings, wherein- Figure 1 represents a side elevation ofthe interior of the improved lock showing the cover of the inclosingcase removed. Fig. 2 represents a similar view showing the bolt inlocked position. Fig. 3 represents a vertical section on the line 33shown in Fig. 2. Fig. 4 represents a rear view of the lock shown in Fig.2. Fig. 5 represents a horizontal section on the line 55 shown inFig. 1. Fig. 6 represents an interior view of the improved lock showinglever, bolt and tumblers removed; and Fig. 7 represents a detail sideelevation of one of the tumblers.

Similar letters refer to similar parts wherever they occuron thedifferent parts of the drawings.

In the drawings A represents the face plate; B, the back plate of theinclosing frame, and C the removable cover of a spring look as usual.

D in Figs. 3 and 5 representsthe door in which the lock is mortised asusual.

E represents the sliding bolt which is actuated bya suitable spring Fshown in Figs. 1, 2 and 4. 4

Inside the case is pivoted at g the lever G having a perforation G'through which is inserted the spindle H to the ends of which are securedthe handles H, H shown in Fig. 3. The lever G is held in its normalposition shown in Figs. 1, 2 and 4. by the influence of a spring Iconnected to said lever G in any suitable manner. o

On the boltEis pivoted ateaspring pressed lever K having a lip orprojection is adapted to engage with the lower end g of the pivotedlever G as shown in Fig. 1 of the draw- The lever K is normally held incontween the handles H, H and the lever G as is usual in spring locks. q

Z, Z and b, c are slotted perforations in the respective plates L, L, Band O to permit an up and down movement of the door knob spindle H andits washers h, h as will hereinafter be more fully described.

To withdrawthe bolt E it is only necessary to depress either one of thehandles or knobs H causing the lever G to actuate the bolt lever Kandthus cause the bolt E to be withdrawn. It will thus be seen that tounlock the door all that it is necessary to do is to depress eitherone'of the handles H without turning the same. I

' For the purpose of locking the bolt E Iemploy a keyM adapted to beinserted through a key hole in either of the plates B, G as shown inFigs. 1, 2, 3, 4, 5 and 6. Said key actuates a spring pressed latch N(Fig. 6) pivoted at n and provided with a projection 9?. adapted toengage with notches O, O in the tumblers O, 0 when the latter are intheir locked and unlocked positions as is usual in springlocks.

On the rear forward portion of the spring pressed lever K is an inclinedor wedge shaped projection k, shown in Fig. 4, which is actuated by thetumblers 0,0 when moved to their forward locked position represented inFig. 2 by which said lever K is tripped so as to cause the lower end gof the lever G to be disengaged from the lip k on the rear end of thelever K as shown in Fig. 2, and in such locked position of the bolt andits tumblers,

the bolt cannot be withdrawnby the depresknobs or handles H combinedwith the spring name to this specification, in the presence of pressedbolt E, the spring pressed lever K pivtwo subscribing witnesses, on this1st day of oted to said locking bolt, and having a wedge August, A. D.1894.

shaped projection is, the spring pressed latch FRANS E. FORSELL. 5 N andone or more notched tumblers O, O Witnesses:

substantially as and for the purpose set forth. ALBAN ANDREN,

In testimony whereof I have signed my CHARLES S. BARKER.

